<?php
namespace TYPO3\CMS\Fluid\Tests\Unit\ViewHelpers;

/*                                                                        *
 * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

/**
 * Testcase for CountViewHelper
 */
class CountViewHelperTest extends \TYPO3\CMS\Fluid\Tests\Unit\ViewHelpers\ViewHelperBaseTestcase
{
    /**
     * @var \TYPO3\CMS\Fluid\ViewHelpers\CountViewHelper
     */
    protected $viewHelper;

    protected function setUp()
    {
        parent::setUp();
        $this->viewHelper = $this->getAccessibleMock(\TYPO3\CMS\Fluid\ViewHelpers\CountViewHelper::class, array('renderChildren'));
        $this->injectDependenciesIntoViewHelper($this->viewHelper);
        $this->viewHelper->initializeArguments();
    }

    /**
     * @test
     */
    public function renderReturnsNumberOfElementsInAnArray()
    {
        $expectedResult = 3;
        $actualResult = $this->viewHelper->render(array('foo', 'bar', 'Baz'));
        $this->assertSame($expectedResult, $actualResult);
    }

    /**
     * @test
     */
    public function renderReturnsNumberOfElementsInAnArrayObject()
    {
        $expectedResult = 2;
        $actualResult = $this->viewHelper->render(new \ArrayObject(array('foo', 'bar')));
        $this->assertSame($expectedResult, $actualResult);
    }

    /**
     * @test
     */
    public function renderReturnsZeroIfGivenArrayIsEmpty()
    {
        $expectedResult = 0;
        $actualResult = $this->viewHelper->render(array());
        $this->assertSame($expectedResult, $actualResult);
    }

    /**
     * @test
     */
    public function renderUsesChildrenAsSubjectIfGivenSubjectIsNull()
    {
        $this->viewHelper->expects($this->once())->method('renderChildren')->will($this->returnValue(array('foo', 'bar', 'baz')));
        $expectedResult = 3;
        $actualResult = $this->viewHelper->render(null);
        $this->assertSame($expectedResult, $actualResult);
    }

    /**
     * @test
     */
    public function renderReturnsZeroIfGivenSubjectIsNullAndRenderChildrenReturnsNull()
    {
        $this->viewHelper->expects($this->once())->method('renderChildren')->will($this->returnValue(null));
        $expectedResult = 0;
        $actualResult = $this->viewHelper->render(null);
        $this->assertSame($expectedResult, $actualResult);
    }

    /**
     * @test
     * @expectedException \TYPO3\CMS\Fluid\Core\ViewHelper\Exception
     */
    public function renderThrowsExceptionIfGivenSubjectIsNotCountable()
    {
        $object = new \stdClass();
        $this->viewHelper->render($object);
    }
}
